Water Hardness in Londonderry
Londonderry has hard water at 259.71 mg/l CaCO₃. This is above the UK national average of 197.72 mg/l. You may notice limescale buildup on taps, in kettles, and around showerheads.
259.71
mg/l CaCO₃
HardUK average: 197.72 mg/l
259.71
0 (Soft)200 (Hard)400+ (Very Hard)
What Does Hard Water Mean?
With a hardness of 259.71 mg/l, Londonderry has hard water. This level of hardness is common in areas supplied from chalk and limestone aquifers in the South East of England.
You will likely notice white limescale deposits on taps, showerheads, and inside your kettle. Over time, limescale can reduce the efficiency of boilers and heating systems, increasing energy costs. A water softener can help prevent these issues.
Water Supplier
- Water Company
- Yorkshire Water
- Supply Zone
- Eastfield (North Yorkshire)
- Source Type
- Groundwater
- Treatment Works
- North Yorkshire Treatment Works
Full Water Quality Report for Londonderry
See all 7 water quality parameters including pH, chlorine, lead, nitrate, fluoride and more.
Frequently Asked Questions
Is water hard in Londonderry?▾
Yes, Londonderry has hard water at 259.71 mg/l CaCO₃, classified as "Hard". You will likely notice limescale buildup on taps, in kettles, and around showerheads. A water softener or regular descaling can help manage this.
What is the hardness of water in Londonderry?▾
The water hardness in Londonderry is 259.71 mg/l CaCO₃ (milligrams per litre of calcium carbonate). This is classified as "Hard" on the standard UK scale and is above the national average of 197.72 mg/l. Water is supplied by Yorkshire Water from underground aquifer sources.
Who supplies water to Londonderry?▾
Water in Londonderry is supplied by Yorkshire Water, which covers the Yorkshire and the Humber region. The water is sourced from underground aquifers (boreholes) and treated at North Yorkshire Treatment Works before distribution.